\Header{topo}{Spatial Topographic Data}
\keyword{datasets}{topo}
\begin{Description}\relax
The \code{topo} data frame has 52 rows and 3 columns, of
topographic heights within a 310 feet square.\end{Description}
\begin{Usage}
\begin{verbatim}
data(topo)
\end{verbatim}
\end{Usage}
\begin{Format}\relax
This data frame contains the following columns:
\describe{
\item[\code{x}] x coordinates (units of 50 feet)

\item[\code{y}] y coordinates (units of 50 feet)

\item[\code{z}] heights (feet)
}\end{Format}
\begin{Source}\relax
Davis, J.C. (1973)
\emph{Statistics and Data Analysis in Geology.}
Wiley.\end{Source}
\begin{References}\relax
Venables, W. N. and Ripley, B. D. (2002)
\emph{Modern Applied Statistics with S.} Fourth edition.  Springer.\end{References}

